Fastening-strip for prepared roofing.



W. H. WOBRHEIDB.

FASTENING STRIP FOR PREPARED ROOFING Patented Junes0,1914

APPLICATION FILED JUNE 13, 1913.

myanbor'z W. .woeminmda MHz s.

VJ'ILLIA' "IFGJRHEKDE, 3F ORANGE, NEW JERSEY,

FASTEEXLT'FSTRXP F5? WUEEIQQ- 1,1391 59 Specification of Letters-Potent, liiesented June 3%, 1914i.

1mins, u eitizen of America residin at Oren e; in the count" s J oi Essex and State oi New oersey, have invented certain new and userul for ments in Fastening-St ins pensive nature,

improvel repured I r is a. lull,

"clear, and exact description, referen nclosing had to the accompanying drawings, rornnng,

a; port of this specification.

My invention reletesrto fastening strips for securing sheets of prepared roonng upon foundations prepared tl eref r, the strips being adapted to'be nailed onto sh" ion and butt joints of the roofing sheets The presentinvention vlids for its object the production of. a she-streets], strip in? this kind, which is oit' ii L Weight" endinexis drilled e ol)", and sis in nail irhicli is provided at intern holes extending througl; its crown, the Jst-rip fleeing reinforced or strengthened 1nlierently, to avoid the break a'rcii'at or between the n 5' down ofits points determined by? null hOlSSlHtllG crown of the strip.

I are fully aware that it is not broadly new to make arched sheet metal fastening strips for use in securing prepared roofing, strips of this kind having heretofore been in general use. As previously constructed,

however, they could only be thoioughly satisfactory to resist the severe nailing strains end pressures, or eieetive 1n obtaining uniformly l inding pressure 1 throughout the lengths of the strips along the laps of roofing, ii rnudeofvery heavy motel, or provided at nailing points with auxiliary means to resist the strain end pressure incident to the driving of nails through and onso the crowns of the strips.

Either the use of heavy sheet metal or the auxiliary strain resistin means at nailing points have heretofore %een necessary for the reesonthet, otherwise, the arched strips would be meshed by the blows of u hammer in driving the nails, and either of these plans is impractical, owing to ilIBQXpEBSlVG- ness of the heavy motel, and the cost of msnui'eeturii g arched strips having auxiliary strain resisting-means at the minim? points. In. making my fastening strips, utilize light and inexpensive sheet metsl and oi): min the desired umiornnty or pressure ,come toed andemo sheets to suchdeg,

isie. sensin new.

throughout tile-swipe, with the sheet metal oiitlie strips so strengthened or reinforced as to inherently resist the strains imposed thereon when driving nails through and ontortl'iekcrowns oi the strips. Bry sodoing, l em. enabled .to minimize the. expense oi manufacture of-vthe strips-and make their use practical in every way, inasmuch. es en needed. requirenientsv in festenings ofi-this kind are provided.

l a'menebledlby my present improvement to produce arched fastening strips fromthin sheetsmetul, which contain the features of merit I have referred to, due to the sheet metal being drawn in a special manner, as will be described, for reinforcement of the strip at the nailing points and, in, addition to drawing lihfl'llllltl st these-points, I permanently set .it to prevent its return to its original position. By so drawing and permanently settin the sheet metal, I furnish such strips wit highly strengthened and stifiened portions through whicli the nails are drivemthereby furnishing adequateresist-anee to'pressures' from the heads of nails driven onto the crowns of the strips, or.

oiows of hammers applied to such crowns at e the nailing points. The drawin and permanent setting of the metal flirt iermore so stiii'ens and holds the metal at the nailing points as to prevent pressure or strain thereut fromloeing continued therefrom to the strips between nailing EOlIltS, and as a consequence, distortion or the stripsbetween nailing points is obviated.v It should be added-further, that in producing my strips, the metal is so drawn as to draw the base flanges of the strips inwardly and upwardly, at nailing points, so that portions of the flanges at such points are narrowed relative to the portions of the flanges between nailing points, and oceu y horizonml lanes above the horizontal p ones of the anges between nailing points. By drawin metal to produce the described differential between the different portions of the base flanges of my strip, I place the fiangepon tions at the nailing points approximately in alinenieut with the arch Walls of the strip,

so tluitni-hen nails are driven throufih the strip at, the-nailing points, the fiunges thereat will be forced downwardly and bed in .the roofing sent spreading oi L the. as?

oh; well lid 1 lie menses sheets before the narrower and higher flange portions at nailing points are lowered to their seats by nailing opei'ations with a very N obvious result of causingthe flanges to bear with uniform binding pressure upon the roofing sheets throughout the length of the strips.

To reinforce the sheet metal of my transversely arched thin metal fastening strip at the nailing points, I draw the sheet metal so as to produce dome-like swells extending upwardly from the crown of the strip, and

continue the drawing action from said dome- Q like swells down, the side walls of the arch, with the result of providing narrow brace swells which converge from the dome-like crown swells into narrow lower ends directly at the bases of the arch walls. This arrangement of the brace and dome-like swells not only results in centering or confining the nailing pressure to points directly contiguous to the nail heads, but as the metal drawn to produce the swells is permanently so set (or killed) at the bases of the drawn areas, the metal in the crown swells is prevented from returning to its former position. This condition due to the ermanent setting, of the drawn metal creating a line of reas sistance at the junction of the crown swells and the metal around them.

Figure I is a top or plan View of a frag ment of one of my roofing securing strips laid" in position ready to be nailed upon the so lap of two roofing sheets. Fig. H is an enlarged sideelevation of a fragment of the strip as it appears before being nailed upon the roofing sheets. Fi III is a greatly enlarged cross section. ta on on line Ill-TH, at Fig. TI, through one of the reinforced 'nail receiving portions of the strip shown as it appears before a nail is driven therethrou h to lower the strip by nail pressure. V

is a View similar to Fig. 111, illustrating the reinforced portion of the' l'fl jp in the lowered position assumed arterhnail is driven therethro'ugh. Fig. V is a greatly enlarged cross section taken on line VV, Fig. Ill,

illustrating the position of the portion of 156 the strip between nailing points as it appears previous to the driving of nails through two adjacent nail holes. Fig. V1 is a view similar to Fig. V, illustrating the position of the strip between nailing points to as it appears after nails are driven through two adjacent nail holes. 1

in the accompanying drawings." A designates a sheet of prepared roofing and B a second sheet of ptepared roofing lapped onto the sheet A. These roofing sheets are mounted upon sheathing or other suitable foundav tion, as is common in the construction of roofs in which prepared'roofing is used.

0 designates one of my fastening strips, the stri s being intended tobe laid in series,

'prefera ly fitted together at their ends to .provide overlapping joints. The strip C is arched transversely, thereby providing a crown 1 and side arch walls 2. At the bottoms of the arch walls are base flanges, which rest upon the roofing sheet the strip 'is-appllc'd to, and which are-forced into firm and uniform binding contact with said sheet by the driving of nails through the strip at its crown, as will hereinafter more fully 30 appear; a

The fastening strip is made of thin sheet metal, and at the points where-the nails are to be driven therethrough the metal of the strip is drawn, providing upstanding do1ne-, like crown swells 3, these swells being perfo- I rated to furnish nail holes 3. The metal of v the strip is also drawn to provide outstanding brace swells 4, which continue downwardly from the dome-like crown swells 3 at the side arch walls 2, the latter swells converging from the crown swells into narrow lower ends which are located directly at the bases of the arch walls. In drawin the sheet metal to roduce the coactive omelike crown swe ls 3 and brace swells 4 I produce such displacement'in the piece of sheet metal from which theetrip is formed as to draw the base flange of the strip upwardly toward the crowni so that the base flanges are formed into portions 5, which are of less width and depth at the-reinforce-' merits provided by the crown and brace swells at which the nails are driven than the intermediate portions 6 of the base flanges located between nailing points. Furthermore, the flange portions 6 project laterally from the arch walls of the strip to a greater extent than the flange portions 5, at the nailing oints the latter being drawn to positions t at render them substantially alined with the lower ortions of the arch walls as seen in Figs. it I and IV.';' j

It will v lee-obvious that by drawi'n apiece of metal in a manner to produce t e-"swells 3 and 4 and in sic-doping "narrow the base flange portions 5 relat ve to'the'flange po tions 6, ll furnish my stri with nail receiving members which, itjt eyare prevented I trorn assuming their former'positions in the metal from which they'were' drawn, will adequately resist the'pressureand strain imposed upon them by nails driven through the nail holes 3': To prevent-the return of the drawn metal present in the swells 3and {t to its former position, I ermanently set the metal around or at the e gas? of these swel by compressive strain, exceeding the limit of elasticity of. the metal, which acts to create lines or resistance around the swells. we

y in conferring an individuality upon the crown swells, and the downwardly extending convergent brace swells coactive with the former. Consequently, when a nail is driven througha crown swell, the pressure of the head of the nail, when brought into contact with the crown swell, is directed through said crown swell, and then downwardly through the brace swells, so that such pressure is centered and confined to points directly contiguous to the nail heads, as hereinbefore mentioned, instead of such pressure being distributed through the fastenin strip etween nailing points, as it :woul be in the absence of the peculiarly formed pressure and strain resisting swells, and the permanent setting of the metal around the swells, as explained.

In Figs. II, III and. V, my strip is illustrated as it appears before nails are driven therethrough. It will be-seen on referring to Figs. II and III that the base flange portions 6 of the strip rest upon the roofing sheet B, while the narrower base flange portions 5 are elevated therefrom. Figs. IV

and VI illustrate the positions of the flangeportions 5 and 6 after nails have been driven through two adjacent nail holes, with the result of such'nails forcing the strip downwardly at hailing points, as illustrated in Fig. IV. -W'hen two adjacent nails are driven, as mentioned, their heads, upon coming into impingement upon the crown swells 3, act to depress the fastening strip bodily,

- whereby the base flange portions 6 between nailing points are lowered into firm contact with the roofing beneath the strip, before the base flange portions 5 at the reinforced nailing points are brought into contact with such sheet. Thereafter upon continued driving of the nails, the base flange portions 5 vare lowered to, and come intofirm contact with the roofing sheet.

flange portions 5, being extended downwardly in substantial alinement from the lower portions of the arch walls of the strip, become embedded and toed into the roofing sheet, and, by so doing act to overcome spreading tendency of the arch strip, even under severe nailing pressure.

Furthermore, the

3. A sheet metal fastening strip arched transversely and having swells drawn from its crown, the said swells being formed with lateral downward brace extensions in the sides of the strip, the metal at the edges of said swells being permanently set tocreate lines of resistance around the swells.

4. A sheet metal fastening strip arched transversely and having swells drawn from its crown, the said swells being formed with lateral downward brace extensions tapering toward the bases of the arch walls. I

5. A sheet metal fastening strip arched transversely and having swells drawn from its crown, the said swells being formed with lateral downward brace extensions tapering toward the bases of the arch walls, the metal at the edges of said swells being permanently set to create lines of resistance around the swells.

6. A sheet metal fastening strip arched transversely and having swells drawn from its crown, the said strip having flanges at the bases of its side walls, the flanges being higher opposite said swells than between said swells. J

7. A sheet metal fastening strip arched transversely and having swells drawn from its crown, the said strip having flanges at the bases of its side walls, the portions of the flanges opposite said swells being substantially in alinenient with the side walls of said strip adjacent their lower edges and being higher than the portions of the flanges between the points at which said swells exist.

WILLIAM, H. 'wonunnmn.

In the presence of- ALBERT T. GUENTHER, HARRY HoUsnL. 

